package com.tanhua.server.service;

import cn.hutool.core.collection.CollUtil;
import cn.hutool.core.util.PageUtil;
import com.github.tobato.fastdfs.domain.conn.FdfsWebServer;
import com.github.tobato.fastdfs.domain.fdfs.StorePath;
import com.github.tobato.fastdfs.service.FastFileStorageClient;
import com.tanhua.autoconfig.template.OssTemplate;
import com.tanhua.commons.utils.Constants;
import com.tanhua.dubbo.api.*;
import com.tanhua.model.domain.UserInfo;
import com.tanhua.model.enums.CommentType;
import com.tanhua.model.mongo.*;
import com.tanhua.model.vo.*;
import com.tanhua.server.exception.BusinessException;
import com.tanhua.server.interceptor.UserHolder;
import lombok.extern.slf4j.Slf4j;
import org.apache.dubbo.config.annotation.DubboReference;
import org.bson.types.ObjectId;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.cache.annotation.Cacheable;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.stereotype.Service;
import org.springframework.util.StringUtils;
import org.springframework.web.multipart.MultipartFile;

import java.io.IOException;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

@Service
@Slf4j
public class SmallVideosService {

    @Autowired
    private FastFileStorageClient client;

    @Autowired
    private FdfsWebServer webServer;

    @Autowired
    private OssTemplate ossTemplate;

    @DubboReference
    private VideoApi videoApi;

    @DubboReference
    private UserInfoApi userInfoApi;

    @Autowired
    private RedisTemplate<String, String> redisTemplate;

    @DubboReference
    private UserLikeApi userLikeApi;


    @DubboReference
    private VideoCommentApi videoCommentApi;

    @DubboReference
    private VideoCommentLikeApi videoCommentLikeApi;


    /**
     * 上传视频
     *
     * @param videoThumbnail 封面图片文件
     * @param videoFile      视频文件
     */
    public void saveVideos(MultipartFile videoThumbnail, MultipartFile videoFile) throws IOException {

        if (videoFile.isEmpty() || videoThumbnail.isEmpty()) {
            throw new BusinessException(ErrorResult.error());
        }

        //1、将视频上传到FastDFS,获取访问URL
        String filename = videoFile.getOriginalFilename();  // abc.mp4
        filename = filename.substring(filename.lastIndexOf(".") + 1);
        StorePath storePath = client.uploadFile(videoFile.getInputStream(), videoFile.getSize(), filename, null);
        String videoUrl = webServer.getWebServerUrl() + storePath.getFullPath();
        //2、将封面图片上传到阿里云OSS，获取访问的URL
        String imageUrl = ossTemplate.upload(videoThumbnail.getOriginalFilename(), videoThumbnail.getInputStream());
        //3、构建Videos对象
        Video video = new Video();
        video.setUserId(UserHolder.getUserId());
        video.setPicUrl(imageUrl);
        video.setVideoUrl(videoUrl);
        video.setText("我就是我，不一样的烟火");
        //4、调用API保存数据
        String videoId = videoApi.save(video);
        if (StringUtils.isEmpty(videoId)) {
            throw new BusinessException(ErrorResult.error());
        }
    }

    //查询视频列表
    @Cacheable(
            value = "videos",
            key = "T(com.tanhua.server.interceptor.UserHolder).getUserId()+'_'+#page+'_'+#pagesize")
    //userid _ page_pagesize
    public PageResult queryVideoList(Integer page, Integer pagesize) {

        //1、查询redis数据
        String redisKey = Constants.VIDEOS_RECOMMEND + UserHolder.getUserId();
        String redisValue = redisTemplate.opsForValue().get(redisKey);
        //2、判断redis数据是否存在，判断redis中数据是否满足本次分页条数
        List<Video> list = new ArrayList<>();
        int redisPages = 0;
        if (!StringUtils.isEmpty(redisValue)) {
            //3、如果redis数据存在，根据VID查询数据
            String[] values = redisValue.split(",");
            //判断当前页的起始条数是否小于数组总数
            if ((page - 1) * pagesize < values.length) {
                List<Long> vids = Arrays.stream(values).skip((page - 1) * pagesize).limit(pagesize)
                        .map(e -> Long.valueOf(e))
                        .collect(Collectors.toList());
                //5、调用API根据PID数组查询动态数据
                list = videoApi.findMovementsByVids(vids);
            }
            redisPages = PageUtil.totalPage(values.length, pagesize);
        }
        //4、如果redis数据不存在，分页查询视频数据
        if (list.isEmpty()) {
            //page的计算规则，  传入的页码  -- redis查询的总页数
            list = videoApi.queryVideoList(page - redisPages, pagesize);  //page=1 ?
        }
        //5、提取视频列表中所有的用户id
        List<Long> userIds = CollUtil.getFieldValues(list, "userId", Long.class);
        //6、查询用户信息
        Map<Long, UserInfo> map = userInfoApi.findByIds(userIds, null);
        //7、构建返回值
        List<VideoVo> vos = new ArrayList<>();
        for (Video video : list) {
            UserInfo info = map.get(video.getUserId());
            if (info != null) {
                VideoVo vo = VideoVo.init(info, video);
                vos.add(vo);
            }
        }

        return new PageResult(page, pagesize, 0l, vos);
    }


    /**
     * 关注用户
     *
     * @param uid
     */
    public void userFocus(Long uid) {
        // 1.获取当前登陆的用户ID
        Long userId = UserHolder.getUserId();
        // 2.查询数据库将关注的用户存入数据库
        UserLike userLike = userLikeApi.isSave(userId, uid, true);
        if (userLike == null) {
            // 3.调用api进行保存
            UserLike user = new UserLike();
            user.setUserId(userId);
            user.setLikeUserId(uid);
            user.setCreated(System.currentTimeMillis());
            user.setIsLike(true);
            userLikeApi.save(user);
        } else {
            // 4.存在进行删除 取消关注
            userLikeApi.del(userId, uid);
        }
    }

    /**
     * 发布评论
     *
     * @param id
     * @param comment
     */
    public void subComments(String id, String comment) {
        //1、获取操作用户id
        Long userId = UserHolder.getUserId();
        //2、构造Comment
        VideoComment comment1 = new VideoComment();
        comment1.setPublishId(new ObjectId(id));
        comment1.setCommentType(CommentType.COMMENT.getType());
        comment1.setContent(comment);
        comment1.setUserId(userId);
        comment1.setCreated(System.currentTimeMillis());
        //3、调用API保存评论
        Integer commentCount = videoCommentApi.save(comment1);
        log.info("commentCount = " + commentCount);
    }

    /**
     * 分页查询评论数据
     *
     * @param id
     * @return
     */
    public PageResult listComments(String id, Integer page, Integer pagesize) {
        //1、调用API查询评论列表
        List<VideoComment> list = videoCommentApi.findComments(id, page, pagesize);
        //2、判断list集合是否存在
        if (CollUtil.isEmpty(list)) {
            return new PageResult();
        }
        //3、提取所有的用户id,调用UserInfoAPI查询用户详情
        List<Long> userIds = CollUtil.getFieldValues(list, "userId", Long.class);
        Map<Long, UserInfo> map = userInfoApi.findByIds(userIds, null);
        //4、构造vo对象
        List<VideoCommentVo> vos = new ArrayList<>();
        for (VideoComment comment : list) {
            UserInfo userInfo = map.get(comment.getUserId());
            if (userInfo != null) {
                VideoCommentVo vo = VideoCommentVo.init(userInfo, comment);
                vos.add(vo);
            }
        }
        //5、构造返回值
        return new PageResult(page, pagesize, Long.valueOf(vos.size()) , vos);
    }

    /**
     * 点赞评论
     * @param commentId
     */
    public void commentsLike(String commentId) {
        Long userId = UserHolder.getUserId();
        Boolean b = videoCommentLikeApi.find(userId,commentId);
        if (b){
            throw new BusinessException(ErrorResult.likeError());
        }
       VideoComment videoComment =videoCommentApi.find(commentId);
        VideoCommentLike videoCommentLike = new VideoCommentLike();
        videoCommentLike.setCommentId(new ObjectId(commentId));
        videoCommentLike.setPublishUserId(videoComment.getPublishUserId());
        videoCommentLike.setUserId(userId);
        videoCommentLike.setCreated(System.currentTimeMillis());
        videoCommentLikeApi.save(videoCommentLike);

    }

    public void commentsDisLike(String commentId) {
        Long userId = UserHolder.getUserId();
        Boolean b = videoCommentLikeApi.find(userId,commentId);
        if (!b){
            throw new BusinessException(ErrorResult.disLikeError());
        }
        videoCommentLikeApi.delete(userId,commentId);
    }

//    /**
//     * 取消视频评论点赞
//     * @param commentId
//     */
//    public void commentsDisLike(String commentId) {
//        //1、调用API查询评论
//        VideoComment videoComment =   videoCommentApi.findById(commentId);
//        //2、判断该条评论是否存在
//        if (videoComment == null){
//            throw new BusinessException(ErrorResult.error());
//        }
//        videoCommentApi.updateById(commentId);
//    }
}
